What speed is used for Minimum Control Speed Ground (Vmcg)?

Minimum Control Speed Ground (Vmcg) is a critical parameter in aviation, specifically concerning multi-engine aircraft. Vmcg is defined as the minimum speed at which the airplane can maintain controlled flight on the ground with one engine inoperative during the takeoff roll.

The value of Vmcg is determined by several factors, including aircraft design, weight, configuration, and environmental conditions. It is essential for pilots to know this speed because it significantly impacts their ability to take off safely. If an engine fails during the initial stages of takeoff, maintaining control of the aircraft is paramount.

In this scenario, the choice of 88 KIAS as the correct answer indicates it is the specific threshold for maintaining directional control on the runway when one engine fails. This speed is critical since exceeding it means the pilot can reasonably expect to have the control needed to navigate the aircraft despite the loss of power from one engine.

Other options reflect speeds that might not be appropriate for the specific configuration and performance characteristics of the aircraft in question, as Vmcg varies significantly from one aircraft model to another and is influenced by design considerations. Knowing the exact value helps ensure that pilots are adequately prepared for situations that require immediate corrective actions, thereby enhancing safety during operations.